What is Docker and How Can It Help You?
Docker offers an efficient and speedy way for users to port applications across different systems. It’s lean and light and lets you contain applications quickly and even run them from within secure environments of their own.
It is one of the most powerful and exciting open source projects available today. It can help with so many things that trying to sum up its capabilities in a single post.
Whether from a development machine to remote server or packaging everything to be used somewhere else, it’s always a challenge as far as porting applications with their dependencies and without any hiccups is concerned. This is an immense challenge and there aren’t too many successful solutions available today.
Basically, docker offers you a complete set of high-level tools which to carry everything which forms an application and offers a number of additional benefits with it too.
Docker hosting is able to achieve this robust application containment using Linux containers. The further potential come from the own components and parts of a project which take out all of the difficulty of working with lower level Linux tools used for application and system management as far as containing processes securely is concerned.
– Docker daemon: This is used for managing containers on hosts.
– Docker CLI: This is used to communicate and command with docker daemon.
– Docker image index: This is a repository for docker images.
– Docker containers: These are the directories which contain everything related to your application.
– Docker images: These are snapshots of base OS images or containers.
– Dockerfiles: These are scripts which automate building process for images.
These images comprise the base for docker containers from where everything starts forming. They are quite similar to default OS disk images that are used for running applications on desktop computers or servers.
With these images, you will get the benefit of seamless portability. They make a dependable, solid and consistent base with everything needed for running applications. When self-contained and when risks are eliminated, the container will be immune to external exposures that can cause trouble. This prevents the dependency hell you would have to deal with otherwise.
As additional layers are added to the base, new images can also be formed by committing to the changes. When new containers are created from saved images, things continue right from where they were paused.
These are scripts which contain successive series of directions, instructions and commands that are executed from new docker images. Every command executed will translate into a new layer, forming the right end products. They eliminate the need for you to do everything manually. When the Dockerfile is executed, you will end up with an image which can then be used to start new containers.
How do you use Docker?
Once you install docker, the intuitive user experience offered makes it easy to use. Once you have the docker daemon running, there is hardly anything else you will need to do.